202 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58. 



scaly punctate (the head very finely so), the propodeiim scaly, also 

 the abdomen except segment 2. Scutellum with a thin carina on 

 each side in the site of the usual lateral groove. Propodeum tricari- 

 nate, the spiracle large, round cephalic. Marginal vein a little over 

 twice the length of the stigmal, the postmarginal distinctly longer 

 than the stigmal. Pedicel somewhat longer than wide at apex. Fu- 

 nicle 1 over twice longer than wide, 2 and 3 large, subquadrate; club 

 ovate, its three joints distinct, also a small terminal spine. First ring- 

 joint very short. Mandibles 5-dentate. 



Two females Placer County, California, August. 



Types. — Cat. No. 20860, U.S.N.M., tlie specimens minutien- 

 mounted, a head and caudal legs on a slide. 



DIMMOCKIA MARYLANDICA. new species. 



Female. — Length, 1.05 mm., rather small. 



Very dark metallic green, the wings hyaline, the venation dusky, the 

 legs black except the white knees and the yellowish trochanters, 

 proximal three tarsal joints, apex of tibiae broadly and distal two- 

 thirds of cephalic tibiae ; base of body of the scape pale. Pedicel some- 

 what longer than funicle 1 which is cupshaped and as long as wide, 

 the other three joints subequal, nearly twice wider than long; club 

 nippleless, divided a little before middle. Mandibles 8-dentate. 

 Antennae inserted on a level with the ventral end of the eyes. Clyp- 

 eus with a convex distal margin. Head and thorax scaly-punctate, 

 the propodeum glabrous, with a strong median carma and smooth 

 lateral sulcus, the spiracle moderate, elliptical-oval. Propodeum 

 with a short neck. Parapsidal furrows complete, five lines. Prono- 

 tum sub transverse-quadrate, half the length of the scutum, the latter 

 more coarsely sculptured than the scutellum. Abdomen sessile, flat 

 above, oval, segment 2 occupying half of the surface, glabrous, the 

 other segments scaly. Abdomen a little wider but no longer than the 

 thorax. Marginal vein nearly thrice the length of tlie long stigmal, 

 the latter distinctly shorter than the postmarginal. 



One female, Glenndale, Maryland, October 4, 1916. 



Type.— C&t. No. 20861, U.S.N.M., the female on a tag, hind tibiae 

 and head on a slide. 



Genus .\STICHOMYIIA Girault. 



Astichomyiia Girault, Descr. Chalc. Var. cum Observ., 1917, p. 4. 

 Female. — Like AchrysocTiaris Girault except that the scape is 

 greatly flattened, the middle of its lower margin being the summit of 

 the convexity. Club with a terminal spine nearly as long as the joint 

 bearing it. Postmarginal vein subequal to the stigmal. Mandibles 

 bidentate, the second tooth much shorter. Parapsidal furrows repre- 

 sented by impressed areas caudad. Propodeum noncarinate. 



